Pump



June 4, 1940. Q w, HARRY l 2,203,464

PUMP

Filed April 1, 1938 2 sheets-sneer 1 +f JJfU-fyy, t T fs*` l\\\` Aa/2l 5 A 2a l z\\ J5 K ffm" .wwf

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PUMP

Filed April 1. 195s 2 shams-snee*L 2 Snventor Patented June 4, 1940 UNITED STATES PATENT ori-*ICE poration of Delaware y Application April 1, 1938, Serial No. 199,491

Claims.

This invention relates to pumps and has been designed particularly to'serve as a fuel pump for gasoline engines.

An object of the invention is to provide such a pump'with an improved pulsator to aid in producing a uniform discharge of fuel. M

Another object is to incorporate the pulsator within the castings which constitute the housing members of the pump.

'A still further object is to provide a having an insulatingV part.

Other objects and advantages will be understood from the following description.

In the drawings: f

Figure 1 is a view of the pump partly in elevation and partly in vertical section. l

Figure 2 is a. section on line 2--2 of Figure l.

Figure 3 is a fragmentary detail in plan of the pump body.

Figure 4 is a plan view of a combined pump diaphragm and pulsator diaphragm.

Figure 5 is a plan view of the pump diaphragm associated with a separable pulsator diaphragm.

Figure 6 is a section on line 6--6 of Figure 5.

Figure? is an elevation partly in section of an installation employing an insulating ring.

Referring to Figures 1 to 4, numeralY II represents the body of the pump and I3 is the top, the parts II and I3 being secured together by cap screws I5. When the pump is mounted on the casing I1 of the engine a lever I9 pivoted in the top I3 at 20 is adapted to be engaged by a cam 2l and rocked in a clockwise direction. A lever extension 23 pivoted to the end of lever I9 at 25 is adapted to be 'engaged with the lever along a wall 2l. When so engaged the lever and pulsator extension rock as a unit. The lever extension 23 is connected as at 29 to astem 3I which is secured to a flexible diaphragm'33, the diaphragm being secured between the body and top members by the fastening means t5. The stem passesthrough a suitable seal designated by numeral and between the seal and the upper diaphragm plate 37 is a discharge spring 39. A spring 4I between the top member and the lever V I9 holds the lever in ,contact with the cam, the rotary movements of the lever produced by' the cam cooperate with the spring 39 in making the vibratory movements of the pump diaphragm thereby making the chamber beneath the diaphragm one of variable volume. Figure 2 shows the pump body provided with an opening 43 for the admission of fuel. This opening communicates by means of passage 45 with the interior of a lter and sediment collecting cup 4l. This cup is held vand (ci. 10s-15o) in position beneath, the body by means of a bail 49 as is customary in fuel pumps, leakage being prevented by gasket 5I. A filtering screen 53 covers the top of the cup 4l and is held in position between the `gasket and the body. After being freed from` sediment the fuel passes upwardly through lter 53 and through an inlet valve" 55 into the pump chamber, this pump chamber being the region immediately below the diaphragm as stated above and marked 51. From 10 the chamber 51 the fuel passes through an outlet valve 59 and is discharged throughl an outlet passage 6I. The body casting is formed with the opening or recess 63 communicating with the discharge passage 6I. The diaphragm, instead of 15 being circular, has a radial extension 65 (Figure 4) covering the opening 63. The pump top member has an extension 61 provided with a recess 69 registering with the recess |53.A The extension of the `diaphragm as shown in Figure 2 separates zuv diaphragm of the fuel pump. In theseV figures 30 the diaphragm'for the fuel pump is marked 33' the diaphragm for the pulsator is marked 65'. y

In Figure 7 is shown a somewhat modified form. In this'form the body is marked II' and is l5 not different in any ersential way from the body of the pump shown' in Figure 1. In this figure I have shown the equivalents of the iilter cup and the bail designated by numerals 4'I and 49. The body portion of the pump is formed with a recess 40 'I3 corresponding to recess 63 of Figure 2. The diaphragm covering this recess is marked 65, inasmuch as it is shown as an integral part of diaphragm 33. It will be understood that the nexible diaphragm for the pulsator might be made 46 separable instead of` integral if desired and as shown in Figures 5 and 6. Between the body II' and the top I 3 is an annulus I5 of fibrous heat insulating material. Fastening means 'I1 are used to secure together the body part, the bre 50 annulus and the top. The fibre annulus, rather than the top, is in this embodiment of the invention, provided with a recess 19 registering Vwith recess 13 and overlying the diaphragm 65. Two advantages are inherent in this modified form of p5.

. of the pump in changed positions of circumferential adjustment. This is not provided for in the form-shown in Figure 1 where the recesses-89 and 63 in the top and in thebody require a definiterelative position of the top and body. In thissecond form of the invention, however, itis only necessary to maintain the relative circumferential position of the fibre a-nnulus with the body, the top i3' being capable of relative adjustment circumferentially as may be desired for any spe-l cie installation.

I claim:

l. In a fuel pump, a body member formed with a pump chamber and a valved outlet therefrom, a second member secured to said body member, a exible diaphragm lbetween said body member and second member over said pump chamber to vary the` volume of said pump chamber, said body member having a recess in communication with said outlet, said second member having a pocket opposite said recess, a flexible diaphragm clamped between salici members and separating said recess and pocket, said diaphragm and pocket forming a sealed chamber to act as a pulsator.

2. The inventiondened by claim Lsaid second member including a rst part of annular form for containing said pocket and a separable second part adapted to support said fuel pump and arranged to be secured to said iirst part and body member in circumferentially adjusted positions to facilitate assembly.

3. 'I'he invention defined by claim 1, said pump `diaphragm and pulsator diaphragm being integral.

4. The invention defined by claim 1, said pump diaphragm and pulsator diaphragm being cofplanar.

5. The invention deilned by claim 1, said second member including a first part of annular form for containing said pocket and a separable second part adapted to support said fuel pump and arranged to be secured to said first part and body member in circumferentially adjusted positions to facilitate assembly, said annular part being composed of brous material. Y

GORDON W. HARRY. .5 

